Ulan Bator, Mongolia climate

BSk Cold semi-arid

Ulan Bator has a strongly seasonal subarctic climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 78°F, while the coldest is January averaging around −23°F at night. Precipitation totals about 8 inches a year and is strongly seasonal — July alone averages 2.1 inches while February barely receives 0.08 inches.

☀️ Summers

Mild

Highs near 78°F in July.

❄️ Winters

Bitterly cold

Lows near −23°F in January.

🌧️ Rain

Very dry

About 8 in of rain a year.

Wettest in July

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Ulan Bator climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	4	15	32	50	63	74	78	74	63	46	23	7
Avg temp (°F)	−9	−1	18	36	49	60	65	61	48	32	10	−6
Avg low (°F)	−23	−16	3	21	34	47	53	48	34	18	−3	−18
Precipitation (in)	0.1	0.1	0.2	0.3	0.7	1.4	2.1	1.6	0.7	0.3	0.2	0.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	4	15	32	50	63	74
Avg temp (°F)	−9	−1	18	36	49	60
Avg low (°F)	−23	−16	3	21	34	47
Precipitation (in)	0.1	0.1	0.2	0.3	0.7	1.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	78	74	63	46	23	7
Avg temp (°F)	65	61	48	32	10	−6
Avg low (°F)	53	48	34	18	−3	−18
Precipitation (in)	2.1	1.6	0.7	0.3	0.2	0.1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	41	46	52	57	60	66	66	60	52	49	50	50
Relative humidity (%)	90	85	69	53	50	53	59	63	61	66	80	89
Wind speed (mph)	5.2	5.8	6.9	8.2	7.9	6.2	5.3	5.2	5.8	5.9	5.8	5.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	41	46	52	57	60	66
Relative humidity (%)	90	85	69	53	50	53
Wind speed (mph)	5.2	5.8	6.9	8.2	7.9	6.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	66	60	52	49	50	50
Relative humidity (%)	59	63	61	66	80	89
Wind speed (mph)	5.3	5.2	5.8	5.9	5.8	5.4

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Chinggis Khaan Intl / Buyant Ukhaa Intl, a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →